By Emily Sohn

Where can people expect to live the longest?

The answer to that question is usually pretty predictable and often dependent on wealth: People generally live longer in richer countries. Like Japan and Switzerland, where average life expectancies exceed 83 years.

In lower income countries, expected years of life are often far shorter — hovering below 55 in a number of sub-Saharan countries, including Chad, Mozambique and Sierra Leone.

But a recent data-crunch turned up a few surprises about how long people can expect to live in certain places, with some particularly encouraging news coming out of Niger.


Christopher Murray, Director of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington and a Professor of Global Health, is the lead author of the study and is quoted in this story.

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